394059811357169 has 2 divisors, whose sum is σ = 394059811357170. Its totient is φ = 394059811357168.

The previous prime is 394059811357067. The next prime is 394059811357187. The reversal of 394059811357169 is 961753118950493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354205084793569 + 39854726563600 = 18820337^2 + 6313060^2 .

It is an emirp because it is prime and its reverse (961753118950493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394059811357169 - 2¹⁶ = 394059811291633 is a prime.

It is a super-2 number, since 2×394059811357169² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (394059811257169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197029905678584 + 197029905678585.

It is an arithmetic number, because the mean of its divisors is an integer number (197029905678585).

Almost surely, 2^{394059811357169} is an apocalyptic number.

It is an amenable number.

394059811357169 is a deficient number, since it is larger than the sum of its proper divisors (1).

394059811357169 is an equidigital number, since it uses as much as digits as its factorization.

394059811357169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220449600, while the sum is 71.

The spelling of 394059811357169 in words is "three hundred ninety-four trillion, fifty-nine billion, eight hundred eleven million, three hundred fifty-seven thousand, one hundred sixty-nine".